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www.cypress.com Document No. 001-42079 Rev. *D 1

AN4078

Migrating From EZ-USB

FX2™ to EZ-USB FX2LP™

Author: Anand Srinivasan

Associated Project: No

Associated Part Family: CY7C68013A/14A/15A/16A

Software Version: None

Related Application Notes: None

AN4078_C provides details on how to migrate an EZ-USB

FX2 based design to EZ-USB FX2LP based design. It

highlights the differences between the EZ-USB FX2LP™ and EZ-USB FX2™. It also provides a brief description of

the whole product support collateral available for development work with FX2LP.

Contents

Introduction ....................................................................... 1

Difference between FX2 and FX2LP ............................ 2

Migrating from FX2 to FX2LP ............................................ 2

Hardware Changes ...................................................... 2

Firmware Changes ....................................................... 2

Details of the Hardware Changes ..................................... 3

Changes to Crystal Specification .................................. 3

Minimum Reset Time.................................................... 4

Ramp-up Time ....................................................... 4

Changes on AVCC/AGND Pin Functionality ................. 4

Details of Firmware Changes ............................................ 4

Disabling High-speed Chirp via EEPROM Config Byte 4

Automatic Disconnect and Reconnect on Hard Reset .. 5

Expanded Code/Data RAM .......................................... 5

Zero-length INPackets with No Firmware Intervention

and Data PID Sequencing for ISO Transfers ................ 5

Feature Enhancements ..................................................... 6

Lower Power ................................................................ 6

Enabling Pull-up on D+ ................................................. 6

FIFO Address Lines Hold Time for

Asynchronous Write ..................................................... 6

ECC Generation on GPIF data ..................................... 6

Package Changes ........................................................ 7

EZ-USB FX2LP Whole Product Support Collateral ........... 7

Development Tool ........................................................ 7

Documentation ............................................................. 7

Summary ........................................................................... 8

Worldwide Sales and Design Support ............................. 10

Introduction

The EZ-USB FX2LP (CY7C68013A) is a next-generation

USB high-speed controller. EZ-USB FX2LP enhances the

functionality of the EZ-USB FX2 (CY7C68013) while

minimally effecting existing designs. This application note

serves two purposes:

1. Assist in migrating existing EZ-USB FX2 (also referred

to as FX2 in this application note) applications to EZ-

USB FX2LP (also referred to as FX2LP in this

application note).

2. Assist the designers familiar with FX2 in creating

FX2LP based applications.

A summary of the main items to consider while replacing

the FX2 in an existing application with an FX2LP part is

provided. The changes are categorized into required

essential changes for all FX2LP applications migrating

from FX2 and other applications based changes that might

be required in your application due to additional enhanced

feature in FX2LP.

1 2 3 4 5 6 7 8 9 10

Indice de contenidos

Pagina 1 - FX2™ to EZ-USB FX2LP™

www.cypress.com Document No. 001-42079 Rev. *D 1 AN4078 Migrating From EZ-USB® FX2™ to EZ-USB FX2LP™ Author: Anand Srinivasan Associated Projec

Pagina 2 - Migrating from FX2 to FX2LP

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 10 Worldwide Sales and Design Support Cypress mai

Pagina 3

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 2 Difference between FX2 and FX2LP Following tabl

Pagina 4 - Details of Firmware Changes

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 3  FX2LP has internal memory from 0x0000 to 0x3F

Pagina 5

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 4 operation the load capacitance of the crystal s

Pagina 6 - Feature Enhancements

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 5 If the existing FX2 application is bus powered

Pagina 7 - Support Collateral

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 6 this workaround, the wMaxPacketSize that c

Pagina 8 - About the Author

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 7 The additional registers for this function are:

Pagina 9 - Document History

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 8 Summary This application note has introduce

Pagina 10

Migrating From EZ-USB FX2™ to EZ-USB FX2LP™ www.cypress.com Document No. 001-42079 Rev. *D 9 Document History Document Title: Migrating Fro

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